<!DOCTYPE html>
<!-- 单页面应用 -->
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <link rel="icon" href="/favicon.ico" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>哇哈哈</title>
    <script src="a.js"></script>
  </head>
  <body>
    <div id="app"></div>
    <script type="module" src="/src/main.js"></script>
    <!-- <button id="btn" >Button</button> -->
  </body>
</html>
<script>
  // window.onload = function () {
  //   const button = document.getElementById("btn");
  //   button.onclick = function () {};
  // };
</script>
